If you put your signature in a dream, it means that you have accepted to do something or willing to agree with the offer that was given to you. The dream warns you that after you put your signature there is no way back, because you accept with all of the conditions.
Dream dictionary: Signature dream meanings
Signing in a dream means strong unavoidable commitments. Signature is a sign of great responsibilities that are going to fulfil. Be aware, do not compromise too much.
Signature dream talks about compliance of a deal, and you have to remember what you felt in the dream so you can analyze whether if this dream is about an excessive desire to tie a situation that worries you.
Important decisions will be made that will turn out to be beneficial to you.
The mail stamp lacks of meaning, so lets talk about the stamp used to print on lead, wax or sealing wax. It is a sign of authority and legitimation equivalent to the signature of what is printed on it. It also symbolizes the secret, protection and the virginity.